Process for processing metal powder through radiation chemical method

Abstract

The invention provides a process for processing metal powder through a radiation chemical method. The inveniton adopts the technical scheme that based on the reduction reaction of metal ions, metal and alloy or metal oxide nanometer particles are generated through the strong reduction action of hydrated electrons on the metal ions in a metal salt solution under the radiation of X rays or gamma rays. The process is characterized in that hydrated electrons and H. free radicals having extremely high reduction capability are naturally generated through the ionizing radiation of a water solution system without adding a reductant into the system; the preparing process is simple, the cycle is short, and the radiation dosage is controllable; product particle sizes are easy to control, and powder of which the average particle size is about 10 nm can be obtained in general; the reduction rate of rare metal can reach 95% or above, and the reduction rate of active metal can reach 70% or above; the preparing cost is low. The process for processing the metal powder through the radiation chemical method has the characteristics of being mild in conditions, short in cycle, high in yield, wide in the range of metal raw materials, is suitable for large-scale massive continuous production and has a wide prospect.

Description

technical field [0001] The invention discloses a radiation chemical method metal powder processing technology. Background technique [0002] Because of its surface effect, volume effect, quantum size effect, macroscopic quantum tunneling effect and other characteristics, nano metal powder has broad application prospects in many fields such as catalysts, microporous materials, conductive paste raw materials in the chemical industry as powder materials. . The commonly used inert gas evaporation and vacuum in-situ pressurization method to prepare nano-metal materials has the characteristics of expensive equipment, high vacuum and low output. [0003] In order to overcome the above problems, the present invention designs a radiation chemical metal powder processing technology, which is based on the reduction reaction of metal ions, and the metal salt solution is irradiated by X-ray or γ-ray, through the strong reduction of hydrated electrons to metal ions, ...

AI Technical Summary

Problems solved by technology

The commonly used inert gas evaporation and vacuum in-situ pressurization method to prepare nano-metal materials have the disadvantages of expensive equipment, high vacuum and low output.